package com.api.test;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * @description:
 * @author: endure
 * @create: 2020-06-04 14:26
 **/

class Count{
    private int count = 0;
    private Random rand = new Random(47);
    public synchronized int increment(){
        int temp = count;
        if(rand.nextBoolean()){
            Thread.yield();
        }
        return (count = ++temp);
    }

    public synchronized int value(){return count;}
}

class Entrance implements Runnable{

    private static Count count = new Count();
    private static List<Entrance> entrances = new ArrayList<>();
    private  int number = 0;
    private  final int id;
    private static volatile boolean canceled = false;
    public static void  cancel(){canceled = true;}
    public Entrance(int id){
        this.id = id;
        entrances.add(this);
    }
    @Override
    public void run() {
        while (!canceled){
            synchronized (this){
                ++number;
            }
            System.out.println(this +"Total："+count.increment());
            try {
                TimeUnit.MILLISECONDS.sleep(100);
            }catch (InterruptedException e){
                System.out.println("sleep interrupted");
            }
        }
        System.out.println("stopping：" +this);
    }
    public synchronized  int getValue(){return  number;}
    public String toString(){
        return "Entrance：" + id + ":" + getValue();
    }
    public  static  int getTotalCount(){
        return count.value();
    }
    public static int sumEntrances(){
        int sum = 0;
        for (Entrance entrance : entrances) {
            sum += entrance.getValue();
        }
        return sum;
    }
}

public class OrderTotallGarden {
    public static void main(String[] args) throws InterruptedException {
        ExecutorService exec = Executors.newCachedThreadPool();
        for (int i = 0; i < 5; i++) {
            exec.execute(new Entrance(i));
        }
        TimeUnit.SECONDS.sleep(3);
        Entrance.cancel();
        exec.shutdown();
        if(!exec.awaitTermination(250, TimeUnit.MILLISECONDS)){
            System.out.println("Some tasks were not terminated!");
        }
        System.out.println("Total："+Entrance.getTotalCount());
        System.out.println("sum of Entrances："+Entrance.sumEntrances());
    }

}
